7

FN6073.3

FIGURE 3A. TEST CIRCUIT

FIGURE 3B. MEASUREMENT POINTS

FIGURE 3. DRIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488E)

FIGURE 4A. TEST CIRCUIT

FIGURE 4B. MEASUREMENT POINTS

FIGURE 4. RECEIVER PROPAGATION DELAY

FIGURE 5A. TEST CIRCUIT

FIGURE 5B. MEASUREMENT POINTS

FIGURE 5. RECEIVER ENABLE AND DISABLE TIMES (EXCLUDING ISL8488E)

D

DE

DI

500

Ω

Z

Y

GND

SW

PARAMETER OUTPUT

RE

DI

SW

Y/Z

X

1/0

GND

15

Y/Z

X

0/1

15

Y/Z

X

1/0

GND

100

Y/Z

X

0/1

100

SIGNAL

GENERATOR

OUT (Y, Z)

3V

0V

1.5V

1.5V

0V

2.3V

OUT (Y, Z)

2.3V

DE

OUTPUT HIGH

OUTPUT LOW

SIGNAL

GENERATOR

R

RO

RE

A

B

+1.5V

15pF

RO

3V

0V

1.5V

1.5V

0V

50%

50%

A

1k

Ω

GND

SW

PARAMETER

DE

A

SW

X

+1.5V

GND

X-1.5V

X

+1.5V

GND

X-1.5V

SIGNAL

GENERATOR

R

RO

RE

A

B

15pF

RO

3V

0V

1.5V

1.5V

0V

1.5V

RO

1.5V

RE

OUTPUT HIGH

OUTPUT LOW

ISL8488E, ISL8489E, ISL8491E